i2c:xfer i2cwrite invalid in ec console
i2c:xfer i2cwrite invalid in ec console

In command
	xfer i2cwrite port addr offset value

16bit offset and 8bit offset call the wrong i2c write interfacefix it.

BRANCH=none
BUG=b:126820386
TEST=1:) Build flapjack EC and flash to DUT ,
         in ec console can read/write i2c device correctly.
     2:) Build kukui EC , build pass.

Change-Id: Ib3aa058ae0917fe62f38bc500a8227d6e36dbab1
Reviewed-on: https://chromium-review.googlesource.com/1496676
Commit-Ready: ChromeOS CL Exonerator Bot <fa429e5907f00867f797423aea74327bb02c91b6@appspot.gserviceaccount.com>
Tested-by: Tony Zou <e61721885f0cc9c0c50b0f4dce55c989c63eddef@huaqin.corp-partner.google.com>
Reviewed-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec